xmonad-config/lib/Xmobar/Plugins/Screensaver.hs

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{-# LANGUAGE LambdaCase #-}
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--------------------------------------------------------------------------------
-- | Screensaver plugin
--
-- Use the custom DBus interface exported by the XMonad process so I can react
-- to signals spawned by commands
module Xmobar.Plugins.Screensaver
( Screensaver(..)
, ssAlias
) where
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import Control.Concurrent
import Control.Monad
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import Xmobar
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import XMonad.Hooks.DynamicLog (xmobarColor)
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import XMonad.Internal.DBus.Control
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import XMonad.Internal.DBus.Screensaver
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newtype Screensaver = Screensaver (String, String, String) deriving (Read, Show)
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ssAlias :: String
ssAlias = "screensaver"
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instance Exec Screensaver where
alias (Screensaver _) = ssAlias
start (Screensaver (text, colorOn, colorOff)) cb = do
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withDBusClient_ False $ \c -> do
matchSignal (cb . fmtState) c
cb . fmtState =<< callQuery c
forever (threadDelay 5000000)
where
fmtState = \case
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Just s -> xmobarColor (if s then colorOn else colorOff) "" text
Nothing -> "N/A"